What Is the Doppler Effect?
2. Waves
The Doppler effect is a result of how light and sound work. Rather than travelling in a straight line as you might expect, they instead travel in waves. This results in a number of interesting phenomena, including the Doppler effect. That light and sound travel in waves is what helps us to see different colors and hear different sounds.
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When light waves are of a high-frequency (or, in layman terms, closer to each other), we see them as being on the violet end of the spectrum. Light waves that travel at a lower frequency appear to us as being on the red end of the spectrum.
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